CVE-2026-0621Published

MCP TypeScript SDK UriTemplate Exploded Array Pattern ReDoS

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-0621

Published

MCP TypeScript SDK

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/%40modelcontextprotocol/sdk",
                    "product": "MCP TypeScript SDK",
                    "repo": "https://github.com/modelcontextprotocol/typescript-sdk",
                    "vendor": "Anthropic",
                    "versions": [
                        {
                            "lessThanOrEqual": "1.25.1",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON